Mark W. Alexander, as far as I'm aware, there's no such organization. Each country's postal service has its own zip code system without regard for international uniformity. For example, Russian zip codes map one to one to post offices. I was surprised to find out that it's not like that in other parts of the world. In some countries (UK and iirc Canada) zip codes even contain letters.

If you eliminate profit off of DNS and domains, how do you keep a scarce resource available to everyone? How do you prevent squatters from registering an entire dictionary worth of domains in every TLD and then extorting people? Current implementation at least tries to be fair.